14 static inline int autofs_can_expire(struct dentry *dentry,  in autofs_can_expire()  argument
17 	struct autofs_info *ino = autofs_dentry_ino(dentry);  in autofs_can_expire()
33 			     struct dentry *dentry, unsigned int how)  in autofs_mount_busy()  argument
35 	struct dentry *top = dentry;  in autofs_mount_busy()
36 	struct path path = {.mnt = mnt, .dentry = dentry};  in autofs_mount_busy()
39 	pr_debug("dentry %p %pd\n", dentry, dentry);  in autofs_mount_busy()
46 	if (is_autofs_dentry(path.dentry)) {  in autofs_mount_busy()
47 		struct autofs_sb_info *sbi = autofs_sbi(path.dentry->d_sb);  in autofs_mount_busy()
79 static struct dentry *get_next_positive_subdir(struct dentry *prev,  in get_next_positive_subdir()
80 					       struct dentry *root)  in get_next_positive_subdir()
84 	struct dentry *q;  in get_next_positive_subdir()
104 	q = list_entry(next, struct dentry, d_child);  in get_next_positive_subdir()
126 static struct dentry *get_next_positive_dentry(struct dentry *prev,  in get_next_positive_dentry()
127 					       struct dentry *root)  in get_next_positive_dentry()
131 	struct dentry *p, *ret;  in get_next_positive_dentry()
144 			struct dentry *parent;  in get_next_positive_dentry()
166 	ret = list_entry(next, struct dentry, d_child);  in get_next_positive_dentry()
193 			      struct dentry *top,  in autofs_direct_busy()
225 			    struct dentry *top,  in autofs_tree_busy()
230 	struct dentry *p;  in autofs_tree_busy()
283 static struct dentry *autofs_check_leaves(struct vfsmount *mnt,  in autofs_check_leaves()
284 					  struct dentry *parent,  in autofs_check_leaves()
288 	struct dentry *p;  in autofs_check_leaves()
316 static struct dentry *autofs_expire_direct(struct super_block *sb,  in autofs_expire_direct()
321 	struct dentry *root = dget(sb->s_root);  in autofs_expire_direct()
363 static struct dentry *should_expire(struct dentry *dentry,  in should_expire()  argument
368 	struct autofs_info *ino = autofs_dentry_ino(dentry);  in should_expire()
381 	if (d_mountpoint(dentry)) {  in should_expire()
382 		pr_debug("checking mountpoint %p %pd\n", dentry, dentry);  in should_expire()
385 		if (autofs_mount_busy(mnt, dentry, how))  in should_expire()
392 			return dentry;  in should_expire()
395 		if (autofs_can_expire(dentry, timeout, how))  in should_expire()
396 			return dentry;  in should_expire()
400 	if (d_really_is_positive(dentry) && d_is_symlink(dentry)) {  in should_expire()
401 		pr_debug("checking symlink %p %pd\n", dentry, dentry);  in should_expire()
405 			return dentry;  in should_expire()
411 		if (autofs_can_expire(dentry, timeout, how))  in should_expire()
412 			return dentry;  in should_expire()
416 	if (simple_empty(dentry))  in should_expire()
425 			if (d_count(dentry) > ino_count)  in should_expire()
429 		if (!autofs_tree_busy(mnt, dentry, timeout, how))  in should_expire()
430 			return dentry;  in should_expire()
436 		struct dentry *expired;  in should_expire()
442 			if (d_count(dentry) > ino_count)  in should_expire()
446 		expired = autofs_check_leaves(mnt, dentry, timeout, how);  in should_expire()
448 			if (expired == dentry)  in should_expire()
449 				dput(dentry);  in should_expire()
462 static struct dentry *autofs_expire_indirect(struct super_block *sb,  in autofs_expire_indirect()
468 	struct dentry *root = sb->s_root;  in autofs_expire_indirect()
469 	struct dentry *dentry;  in autofs_expire_indirect()  local
470 	struct dentry *expired;  in autofs_expire_indirect()
471 	struct dentry *found;  in autofs_expire_indirect()
479 	dentry = NULL;  in autofs_expire_indirect()
480 	while ((dentry = get_next_positive_subdir(dentry, root))) {  in autofs_expire_indirect()
482 		ino = autofs_dentry_ino(dentry);  in autofs_expire_indirect()
489 		expired = should_expire(dentry, mnt, timeout, how);  in autofs_expire_indirect()
508 		if (expired != dentry)  in autofs_expire_indirect()
509 			dput(dentry);  in autofs_expire_indirect()
517 		if (expired != dentry)  in autofs_expire_indirect()
532 	struct dentry *dentry = path->dentry;  in autofs_expire_wait()  local
533 	struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);  in autofs_expire_wait()
534 	struct autofs_info *ino = autofs_dentry_ino(dentry);  in autofs_expire_wait()
559 		pr_debug("waiting for expire %p name=%pd\n", dentry, dentry);  in autofs_expire_wait()
566 		if (d_unhashed(dentry))  in autofs_expire_wait()
584 	struct dentry *dentry;  in autofs_expire_run()  local
592 	dentry = autofs_expire_indirect(sb, mnt, sbi, 0);  in autofs_expire_run()
593 	if (!dentry)  in autofs_expire_run()
596 	pkt.len = dentry->d_name.len;  in autofs_expire_run()
597 	memcpy(pkt.name, dentry->d_name.name, pkt.len);  in autofs_expire_run()
599 	dput(dentry);  in autofs_expire_run()
605 	ino = autofs_dentry_ino(dentry);  in autofs_expire_run()
618 	struct dentry *dentry;  in autofs_do_expire_multi()  local
622 		dentry = autofs_expire_direct(sb, mnt, sbi, how);  in autofs_do_expire_multi()
624 		dentry = autofs_expire_indirect(sb, mnt, sbi, how);  in autofs_do_expire_multi()
626 	if (dentry) {  in autofs_do_expire_multi()
627 		struct autofs_info *ino = autofs_dentry_ino(dentry);  in autofs_do_expire_multi()
628 		const struct path path = { .mnt = mnt, .dentry = dentry };  in autofs_do_expire_multi()
641 		dput(dentry);  in autofs_do_expire_multi()